Vertebral pedicle positioner for spinal column posterior approach minimally-invasive screw fixation

Abstract

The invention discloses a vertebral pedicle positioner for spinal column posterior approach minimally-invasive screw fixation. The vertebral pedicle positioner comprises a pair of same metal ring bodies, wherein fluoroscopy rays can not penetrate through the metal ring bodies. The metal ring bodies are fixedly connected through a connecting part and located in the same plane. When the positioner is transversely arranged on the back of a patient for fluoroscopy, drop shadows of vertebral pedicles on two sides are positioned in the metal ring bodies at the same time through fine adjustment of the positioner. The vertebral pedicle positioner for the spinal column posterior approach minimally-invasive screw fixation has the advantages that the vertebral pedicles can be accurately and easily positioned on a body surface, a small surgical incision is accurately selected, and therefore a surgical operation portion can be achieved through division of a gap between multifidus muscle and longissimus muscle under direct vision under the condition that the length of the incision is the same as that of an incision in the prior spinal column minimally invasive technology; the situation that the muscle is injured due to the fact that a surgical approach is conducted in the muscle because of percutaneous direct puncture is avoided, and a vertebral pedicle screw fixation portion and a vertebral plate can be easily found for the screw fixation and decompression; and the positioner is easy and convenient to operate, fast, time-saving and capable of preventing excessive rays from being exposed.

Description

technical field [0001] The invention relates to a pedicle positioner for minimally invasive screw placement in the posterior spinal column, belonging to the field of medical instruments. Background technique [0002] Pedicle screw technology has developed rapidly since its introduction in the 1980s, and has been widely used in the surgical treatment of spinal degeneration, spondylolisthesis, spinal stenosis, vertebral fractures, deformities, bone metastases, and spinal instability. . At present, pedicle screw is one of the most widely used internal fixation devices in spinal surgery. Pedicle screw implantation methods mainly include: 1. Posterior median incision screw insertion, which is a traditional surgical method, is currently widely used in clinical practice and is widely accepted by most clinicians; its main disadvantage is that the surgical trauma is relatively large, The needle entry point of the pedicle is difficult to expose, and there is more bleeding. The posto...

AI Technical Summary

Problems solved by technology

[0004] The positioning of the anterior pedicle by the traditional minimally invasive technique of posterior spinal screw placement is relatively complicated and time-consuming. Generally, preoperative Kirschner wire puncture is used to locate the posterior channel of the pedicle. and medical staff are exposed to more rays; the post-puncture expansion approach may deviate from the gap between the multifidus and longissimus muscles and cause damage to the multifidus and longissimus muscles

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